FYI, I don't believe this solution is the one we intended to merge upstream. There is a different approach used in the riscv-linux tree from Palmer. On Wed, Aug 1, 2018 at 8:14 AM, Christoph Hellwig <hch@xxxxxx> wrote: > Hi all, > > this series with patches originally from Palmer and Wesley adds support > for the pcie-xilinx host driver on RISC-V boards. The interesting part > about that is that the IP blocks is limited to 32-bit DMA internally, > which didn't seem to be an issue with the existing users, but shows > up easily with the Sifive RISC-V boards that have physical memory > wired up above 4G. > > Note that patches 1 and 2 depend on changes in the dma-mapping tree > to add the bus_dma_mask field to struct device and would have to merge > through the dma-mapping tree or a shared stable branch. Patch 3 could > be merged independently. > > Changes since v1: > - move the add_dev method to struct pci_host_bridge > - use the new bus_dma_mask field
